package com.config;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("===========处理前===========");
        //return true; 执行下一个拦截器，放行
        //return false; 不执行下一个拦截器，拦截
        return HandlerInterceptor.super.preHandle(request, response, handler);

        // 可以编写是否登录判断，重定向到登录页面，或者抛出未授权403状态码
        //  return false;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("===========处理后===========");
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("===========清理===========");
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}
